Iotop is a Python program with a top like UI used to show of behalf of which process is the I/O going on. It requires Python ≥ 2.5 and a Linux kernel ≥ 2.6.20.
Iotop is licensed under the terms of the GNU GPL.
The latest version is Iotop 0.2.1, available here : iotop-0.2.1.tar.bz2 or iotop-0.2.1.tar.gz.
RPMS: iotop-0.2.1-1.src.rpm or iotop-0.2.1-1.noarch.rpm.